Part of me hopes a fork comes out of this. I mean maybe features like this PR[1] for local state file encryption can then finally get merged.
Update: and in the past hour this repo is gone.
The fork you mentioned is no longer existing.
Indeed, any fork will need to implement their own bug fixes.
Ideally they should do this "clean room" and not even look at the BSL'd code, to help defend against any accusations of copyright infringement.
Which is interesting, since Digger (the company that created that fork) is one of the OpenTF Manifesto signatories. Maybe they're recreating it under a different name / without the Hashicorp/Terraform branding all over the place?